Working with grep, sed, and awk Pocket Primer (PDF)

The goal of this book is to introduce readers to three powerful command line utilities that can be combined to create simple yet powerful shell scripts for performing a multitude of tasks. The code samples and scripts use the bash shell, and typically involve very small text files so that you can focus on understanding the features of grep, sed, and awk. In the simplest terms, grep (global regular expression print) will search input files in data for certain words or word patterns and print the lines that match it. sed is useful for changing or modifying data. Awk is a programming language also used for searching a data file for certain patterns, but can also perform certain tasks on the pattern matches it finds. Aimed at a reader relatively new to working in a bash environment, the book is comprehensive enough to be a good reference and teach a few new tricks to those who already have some experience with these command line utilities.

OSWALD CAMPESATO, MBA, MA, MIS, BSCS, BA, is the co-founding CEO of iQuarkt and author of more than 45 technical books, including books on Python, Java, and managing datasets and models. He is an adjunct instructor at UC-Santa Cruz, currently teaching courses in Python and Data Science. He has more than 20 years of experience as a software developer and has worked in numerous management roles. Previous experience includes jobs at Oracle, AAA, and Just Systems of Japan, along with various startups.